Title :
Quantizing for Correlation Decoding
Author :
Blizard, Robert B.
Author_Institution :
Martin Marietta Corp., Denver, Colo.
fDate :
8/1/1967 12:00:00 AM
Abstract :
The increase in error rate due to quantizing is examined for the special case of a digital correlation decoder such as can be used for orthogonal and other block codes. Three types of effect are considered separately: 1) the increase in variance, which is proportional to the square of the quantum interval; 2) a threshold, proportional to the quantum interval, caused by the ambiguity when the received signal correlates equally with two code words; 3) the effect of limiting. Approximations are obtained for small quantizing loss, the case of greatest interest since the object of correlation decoding is high efficiency. For a 7-bit biorthogonal code and a total of 16 quantum levels the increase in error rate is computed as a function of the quantum interval, and an optimum is found.
Keywords :
Analog signals; Coding; Communication theory; Detection; Digital signals; Errors; Communications technology; Decoding; Degradation; Distortion measurement; Error analysis; Limiting; Quantum computing; Signal to noise ratio; TV; Voltage;
Journal_Title :
Communication Technology, IEEE Transactions on
DOI :
10.1109/TCOM.1967.1089615